#include<bits/stdc++.h>
using namespace std;
int n;

inline int read(){
    int x=0, f=1;
    char ch = getchar();
    while(ch<'0'||ch>'9'){if(ch == '-')f=-1; ch = getchar();}
    while(ch>='0'||ch<='9'){x = (x<<1)+(x<<3)+(ch-'0'); ch = getchar();}
    return x*f;
}


int main(){
    freopen("arena.in", "r", stdin);
    freopen("arena.out", "w", stdout);
}
